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Pulsar DC/DC20SD Quick Start Manual

Dc/dc 2a step down dc/dc converter with adjustable output voltage
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 Step down DC/DC converter with adjustable output voltage
 Example of use: step down from 24V to 12V DC
 The input voltage range: 8÷28V DC
 The output voltage range: 4,5÷19V DC
 The minimum difference between input (lowered) and output
voltage: 3V
 The maximum load current 2A (24W)
 The AW technical output indicating converter failure triggered
by:
 Short-circuit of the output
 Output overload
Example of use of the DC/DC20SD step down DC/DC converter with adjustable output voltage.
1.

Technical description

The step down converter DC/DC 2A (DC/DC20SD) is used for step down the input voltage from the range between 8V÷28V
DC to the voltage range of 4,5V÷24V DC at the output, adjusted with the P1 potentiometer. The maximum load current is Imax=2A
(Pmax=24W). The 3V difference between the input (lowered) and output voltage is required for the proper operation of the converter.
The module does not feature galvanic isolation between input/output (IN-AUX) and operates on common "ground" (0V) potential (IN-
and AUX- terminals are galvanically connected = common terminal).
DC/DC 2A Step down DC/DC converter
with adjustable output voltage
The module's features:
Schematic diagram of the converter operation.
Adjustment of the
converter
1
DC/DC20SD
v.1.0
Edition: 3 from 11.02.2016
Supercedes the edition: 2 from 15.01.2016
 Protections:
 Short-circuit protection SCP
 Overload protection OLP
 OHP overheating protection
 High efficiency: 80÷90%
 Optical LED indication
 Warranty – 2 years from the production date
 Mounting:
 Mounting strip with adhesive tape
 Mounting screws
output voltage: 4,5V÷19V DC, 2A max.
EN**

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Summary of Contents for Pulsar DC/DC20SD

  • Page 1 Technical description The step down converter DC/DC 2A (DC/DC20SD) is used for step down the input voltage from the range between 8V÷28V DC to the voltage range of 4,5V÷24V DC at the output, adjusted with the P1 potentiometer. The maximum load current is Imax=2A (Pmax=24W).
  • Page 2 1.1. Block diagram (Fig.1). Fig.1. Block diagram of the converter’s module. 1.2. Description of components and connectors (Fig. 2, Table 1, Table 2). Table 1. Component’s description [fig.2] IN LED light - red Power connector of the DC/DC module P1 voltage adjustment (4,5÷19V) Jumper –...
  • Page 3 P module power 24W max. (see fig.3) Energy efficiency 80%÷ 90% for full range of power and loads Ripple voltage 20mV p-p...50mV p-p Output current 2.0A max. (See fig.3) Current consumption by module systems 10 mA max. Short-circuit protection SCP and overload 180% - 200% of module power - output power limit, protection OLP automatic return after elimination of short circuit...
  • Page 4 GENERAL WARRANTY CONDITIONS 1. Pulsar (manufacturer) grants a two-years quality warranty for the equipment, starting from the production date. 2. The warranty includes free-of-charge repair or replacement with an appropriate equivalent (selected by the manufacturer) if the malfunction is due to the manufacturer.

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